Paper cutter



Sept. 20, 1949. J MATTHEWS. 2,482,118

' FAPER CUTTER Filed 001;. 10, 1944 Roberf J'Mcz #h @408 Patented Sept. 20, 1949 UNITE-D STATES PATENT OFFICE 2,482,118 PAPER CUTTER Robert J. Matthews, Hastro'uck Heights, N. 3. Application octane-r 10,- 1944mm Nassau 4 claims.- (01164-41) (Granted under the amended April 50,

The-invention described herein may be manu= featured and used by or for the Governmentfor governmentai purposes, without the payment to me of any royalty thereon. I

This invention is in pa er machines and arti'euiarl'y is a paper cutting device.

The principal object "of the invention is toprovide novel means for forming a plurality of'paraliel slits in cardboard or paper blanks, leaving a predetennined portion o'f'the' blanks uneut.

Certain arts, as cryptography, require the use of large numbers ofnarrow strips of paper, cardboard, plastic or the like with printed data thereon. Normally, such strips are prepare in sets, and information on one s'tripor a set coinmonly bears an important relation to the informaiionon other strips of the set. It is, therefore, necessary that great are be exercised to assure that all sets of such strips are complete without duplications or omissions. if strips can-be pr pared and carried or shipped as sheets rather than separately, it is possible not only to effect economies in preparation for shipment but also to provide an easy check on thecempieteness of the sets.

The present invention contemplates the preparation of strips as indicated from blanks some-- what longer than the strips themselves require, theblanlrs being left -unslit at one or both of their ends, it being intended'theii that the ultimate user of the strips separate them "from the sheets;

Ether objects will beappsredt from a readin of thef'ollowingdescriptidfi and Claims.

In the drawings:

Figure 1 is an elevation of the invention showing only the principal elements thereof.

Figure 2 is an isometric sketch illustrating the organization of the parts of the invention.

Referring to the drawings, represents a table over which the paper blanks are fed. Guides, as I0 and III", are provided to assist in the delivery of the blanks. The table surface is broken transversely at one point, as at ll. Just below the opening in table II! is mounted for rotation a roller l2, so arranged that its periphery is tangent with or slightly above the upper surface of table l0. In the apparatus illustrated this roller is adapted for clockwise rotation.

At the right end of table III are arranged two :ther rollers, l3 and I4. These are serrated, and ;heir notches or teeth fitted together. The rollars l3 and I4 rotate in opposite directions, l3 :lockwlse and H counterclockwise.

The roller I3 is mounted on a shaft, l5, and

mounted oiio'pposite ends of the same shaftlifor rotation independent of lij'lli {,3 are cams l6 and f1. Cam It Ease toe orextension,ltj, and if, a similarextension, IT. in the preferred embodiment of the invention, cams l6 and '11 no net revolve through a full circle but oseiliate through arcs determined by the requirementsjof the particular cutting operation to'b' performed.

The railers 12 and n are driven inan'y'desired fashicin; this'not forming a art-or the present invention. Roller 12 turns with a shaft, W, on one hd or wh'i his a' 'g'ear wheel in meshing with a gear wheel, l9; on the end of shaft is, According; to the drawings, both rollers turn at the same speed'but e be driven atanigher rate, if desired, nier'eiy by varying the sizes of gears f8 and IQ.

Just forward of roller :2 (to the rightin Fi ure 2) is a shaft, NLwhich may be mounted desired fashion, and this shaft carries earns 2i and 22, nevi g toes 2| and 2'2" respeetiv'eiy. Mounted to ride on "cams .21 and 22 are brakingmeans. and 2'5t,,and these are adapted to extend upwardly through-guides, as 26, andthrough table it, Brake 24 has a flange, 28, fixed thereon,- and this flange is adapted to compress a spring, 29, wheneverthe braking member is raised. firaking member 25 is similarly arranged-i Shaft 20 may be driven; through suitable gearing by the same means which drives the roller [2 and shaft- [5 and in turn, by means of connecting rod- 30 and eccentric 31, provides cam 16 with its oscil latory motion. 1

. Means,- as springs in and M, are provided for holding the rollers I3 and I4 normally in engagement with each other.

The device operates in the following manner: Paper blanks are fed one at a time from any convenient type of hopper (not shown) to the table l0 and over the roller I2. The orientation of cams 2| and 22, with relation to I 6 and I1, is such that, when the feeding operation occurs, braking means 24 and 25 will have been driven to their raised positions by the toes 2| and 22 of the cams 2| and 22. The braking means serve not only to restrain a blank until an earlier cutting operation has been completed but also to align a blank properly upon table II] before entry into the cutters.

After a predetermined time interval, limited by the effective length of the cam projections 2| and 22', braking means 24 and 25 drop through table "I, and the paper blank is projected forwardly by the roller 12 and enters between rollers l3 and M where it is cut into strips by the interacting rotating teeth thereof. Again, after a predetermined time interval, normally before the blank has passed completely through the cutters, cams l6 and 11, moving counterclockwise on shaft l under the influence of shaft 20 and linkage 30-3l, will, turn sufficiently for their toe members if. and l| v to, abut against roller l4"an d'thus dis 'ngage roller l4. frorn-r'oll'er l3. The clearance provided between the cutters under these conditions is small, and gear wheels 18 and I9 are not disengaged. The blank will be propelled forwardly by roller I3 until it clears the machine, at which time cams LB, move clockwise, rollers I3 and 14 will be mengaged by springs 40 and 4l-, and the operationcan be repeated.

and (I will In a machine for cutting a blank, a first roller having a? plurality of annular cutting edges, a second roller having a plurality of an- Obviously, by properly relating the -s'everal cams, the sizes of their peripheralprojections and r V it is possible to achieve any desired relation between the cut and their speeds of movement,

the uncut portions of the paper blank. V The above description is in specific'terms. It

should be understood that the invention is' not limited to'the exact structure shown and. de-

scribed,and for "the true scope of the invention reference should be had to the appended claims.

Iclaimi I 1. In a machine for cutting a blank .a table or the like over which the blank is movedto be cut, a roller having a plurality of annular cutting edges, a second roller having a plurality of cut ting edges adapted to cooperate with the cutting edges of the first mentioned roller to perform a cutting operation, means for feeding a blank over said table and between said rollers, means in 'the nature of a camhaving a peripheral extension on one of said rollers for abutting against the other of said rollers to separate the two said last mentioned means being: mounted forrotation independent of its roller,"braking means in eluding stops ,adaptedzto be projected through said table adjacent said rollers when said rollers are separatedfor preventing said feeding mean from feeding 'a blank therebetween, and

means connecting said braking means and the" camming means to provide an 'oscillatorym ti for the latter. r u

nular-cuttingedges adapted to cooperate with the annular edges of the first mentioned roller said second mentioned roller being in superposed relation to said .first. mentioned roller and being driventhereby, said first mentioned roller having a cam at each end thereof mounted for independent rotation with respect thereto eachcam having an extension adapted to abut against the second mentioned roller to lift the same, when in one position,'means for feeding paper between' the rollers, means for intermittently preventing a feeding operation, and means cooperating with said. last mentioned .means ..,f. orf oscillating said cams. V r 4.111 a machine. for cutting blanks including two superposed rollers having cooperating annular cutting .edges thereon, a cam oneach endof 2.'In a machine'for cuttingfa blank, a ro I tatably "driven roller having a plurality of fannular cutting edges, a second rotatably driven roller having a plurality of cutting edges adapted to cooperate with thecutting edges of the firstroller to perform a cutting operation, a table adjacent.

said rollers, means on sa1d table for feeding a' blank between said rollers; a shaft beneath said one of. said rollers the cams having extensions adapted when in one positionto abut against the other rollerto separate the two rollers said cams being mounted for rotation independent of theroller upon "which they are mounted, means including a shaft spaced from said rollers and having. a' connecting rod in the nature of .a crank driven therebyand secured to one of said cams forproviding oscillatory motion for sa-idcarn.

' .ROBERTJ. MATTHEWS.

iREFEBENCE SC ITED' Thefollowing referencesyare. of. record in the 7 file of this patent:

mms fmms Number I V V 46,448 Clarke Feb; 21, .1865

154,450 lBraidwood Aug. 25, 1874* 209,448 -Blackhall Oct. .29, 1878.

995,868 Housam June 20, 1911 1,670,051 -;Slaysman'.. May 15,, 1928 Date 

